//promo.js

	var pics = [
				
		"http://www.hr-s.net/images/topbg/topbg_00.jpg",
		"http://www.hr-s.net/images/topbg/topbg_01.jpg",
		"http://www.hr-s.net/images/topbg/topbg_02.jpg",
		"http://www.hr-s.net/images/topbg/topbg_03.jpg"
	
	];
	
	var req = location.href.split("?")[1];
	
	if(req != "" && req <= pics.length)
	{
		n = req - 1;
	}
	else
	{
		n = Math.floor(Math.random()*pics.length);
	}
	
	document.write('<style type="text/css">');
	
	document.write('body{background:url("'+pics[n]+'") top center repeat-x;}');
	
	document.write('</style>');